Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0eee72b8f4e38386d57cb068358c8584c8e62077dc99396956496f79f078f61c' 
  AND token = 'YrMJ5Rv6w5FuxOQyYzfITYAe3u0c+Kbv4xf6vzEwMcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}